Question

find the distance travelled when the average speed is 60km/hr and the time taken is 3 1by 2 hours

Answer 1

A car covers 1/3 of the distance with 60km/h during the journey and the remaining distance with 30km/h. What is the average speed during the journey?

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9 ANSWERS



Rishav Kumar Agarwala

Answered Jul 9, 2017

Answer is 36km/h.

Consider the following situation:

Distance to be travelled = 180 km

1/3rd distance = 60 km

Now, left distance is 120 km

To travel 60 km at the speed of 60 km/h, Time taken =1 hour

To travel 120 km at the speed of 30 km/ h, Time taken = 4 hour

Therefore Average Speed = total distance÷ total time = 180/5 = 36 km/h.

Note: 180 km distance taken for simplicity of calculation. One may try taking any distance and yet the answer will remain same.

Answer 2

Answer is 36km/h.

Consider the following situation:

Distance to be travelled = 180 km

1/3rd distance = 60 km

Now, left distance is 120 km

To travel 60 km at the speed of 60 km/h, Time taken =1 hour

To travel 120 km at the speed of 30 km/ h, Time taken = 4 hour

Therefore Average Speed = total distance÷ total time = 180/5 = 36 km/h.

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